_heapmin

Article
06/05/2017

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The latest version of this topic can be found at _heapmin.

Releases unused heap memory to the operating system.

Syntax

int _heapmin( void );

Return Value

If successful, _heapmin returns 0; otherwise, the function returns –1 and sets errno to ENOSYS.

For more information about this and other return codes, see _doserrno, errno, _sys_errlist, and _sys_nerr.

Remarks

The _heapmin function minimizes the heap by releasing unused heap memory to the operating system. If the operating system does not support _heapmin(for example, Windows 98), the function returns –1 and sets errno to ENOSYS.

Requirements

Routine	Required header	Optional header
`_heapmin`	<malloc.h>	<errno.h>

For more compatibility information, see Compatibility in the Introduction.

.NET Framework Equivalent

Not applicable. To call the standard C function, use PInvoke. For more information, see Platform Invoke Examples.